minor



(No Model.) 2 Sheets-Sheet 1.

J. W. MINOR.

PIGKET POINTING MACHINE.

No. 469,390. Patented Feb. 23, 1892.

(No Model.) 2 Sheets-Sheet 2.

J. W. MINOR. v PIGKBT POINTING MACHINE. No. 469,390. Patented Feb. 23, 1892.

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! i i-1+ i i WFFNEEEEE INVENTIIJR: @MV%JW%ZPJ fafiw w BY 6%M1U ATTORNEY.

UNITED STATES PATENT OFFICE.

JOHN 1V. MINOR, OF BROOKTON, MASSACHUSETTS.

PICKET-POINTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 469,390, dated February 23, 1892. Application filed March 5, 1891. Serial No. 383,900. (No model.)

To aZZ whom itmay concern:

Be it known thatl, JOHN WV. MINOR, a citizen of the United States, residing at Brockton, in the county of Plymouth and State of Massachusetts, have invented a new and useful Picket-Pointing Machine, of which the following is a specification.

My invention relates to picket-pointing machines designed for the pointing of pickets for use in the making of fences and the like;

and it has for its object the pointing of pickets in true curves of any desired length of radius within the limit of the machine in an expeditious and economical manner.

Figure 1 represents my .picket pointing machine in side elevation, a picket being shown to illustrate the method of picketpointing. Fig. 2 is a plan of Fig. 1, with the exception that the picket is not shown. Fig. 3 is a sectional view of Fig. 1 on line 15 15, looking toward the rear of the machine. Fig. 4 represents, upon an enlarged scale, the sliding fulcrum in side elevation. Fig. 5 is afront elevation of Fig. 4, and Fig. 6 is a plan of Fig. 5. Fig. 7 represents the cutter-head, upon an enlarged scale, in plan, the leverarms being shown in section. Fig. 8 is a sectional view of Fig. 7 on line 16 16, a portion of one of the lever-arms being shown. Fig. 9 represents one of the cutter-head disks in elevation, and Fig. 10 is a plan of Fig. 9.

The frame of the machine is composed of the main frame 20, supported by the legs'21, and it is provided with fulcrum-support 22, which is firmly fastened to the frame, the le- Ver-chafing pieces 23, the adjustable headblock 24, and the chip-clearance space 25. The fulcrum-support 22 is provided with a vertical groove extending its entire length, as

represented by dotted lines in Fig. 1, and the bolt 26, by means of which the fulcrum 27 is adjustably fastened to the fulcrum-support.

The fulcrum 27 is provided with the lugs 28, adapted to slide within the vertical groove of the fulcrum-support, slot 29, by means of which and the use of the bolt 26 the fulcrum may be adjustable secured to the fulcrum-support, the friction-boss 30, which is designed to lessen the rubbing friction of the lever-arms against the fulcrum, and the hole 31, through which the pivot-bolt 32 passes, which pivotally secures the lever-arms to the fulcrum.

The adjustable head-block 2a is provided with a groove, as represented by dotted lines in Fig. 1, which is adapted to fit over the front portion of the main frame and to slide thereon, and the slot 33, by the use of which and the heackblock bolt 34 the head-block may be adj ustably secured to the main frame.

The cutting-lever 35 is composed of the two iron lever-arms 36 and the Wood handle 37. The lever-arms are securely fastened to the handle by means of bolts, as represented, and

cutter-knife 4:1, and the spring chip-breaker 42. These parts are all adjustably secured together and to the cutting-lever arms by means of the cutter-head shaft'or bolt 39, which passes through the lever-arms and disks. Each disk 40 is provided with the groove 43, designed to receive the cutter knife. the parts composing the head are assembled as follows: The knife is placed in the grooves of the two disks, and they are then placed in position between the lever-arms. The cutterhead bolt is then passed through the arms and disks. The chip-breaker is then placed upon the knife, and it is held in its position, as represented, by the cutter-head bolt. Then the cutter head is adjustably secured in its position between the lever-arms by the cutter-head bolt. It is essential in order to per- The cutter-head is constructed and it form good smooth work in the pointing of pickets that the cutter-head should be adj ustably secured between the lever-arms in such a manner as will permit a change in the augularity of the knife in its relation to the le- 5 ver-arms and also that the knife may be longitudinally adjusted within the cutter-head, for the reason that the cutting-edge of the knife should be set at such a distance from the cutter-head bolt and lever-arms as will IGO' tance from the pivot-bolt 32 totheedge ofithe cutting-knife will be equal to theradius of the desired arc of circle or curve of the point I 5 of the picket. The head-block is then so adjusted-that-the cutting-knife willnot cut below the=center ot'the picket; Thecutter-head is then adjusted as previously described 2 v'lhen by-operatingvthe handle otlthe -'cutting-- 2c lever in the direction as indicated. by.- an ar-. row in Fig. 1 th'eyknife will..cutand.point- 1:: one-half of the. picket ona curved orcircular .line, asarepresented by\ dotted curveddine on I Fig. 1:. By tu-rningthe picket-over and repeat- .ingthe .cuttingioperation the :other side may wbe xcut thereby completing .the .pointing op-- cutter-head 3.8, which ,is composed of .the cut- 65 .ter-head'rdisks 40,: cutter-knife lb-and. chi peration By1the use of the adjustable: Ef-ulcrum .and;

.th.e ;-lever-arms-provided with..the series of o'-.ho1es -a--great= variety of. cuts may be made wand: .also-:pickets of many Jdifterentwidths may be pointed having. any desired: curve .within the limit otthe machine, therebytgiw,

ing a great range to the machine. When it is desired to use any of thelowen holes of the series of -holes in thelever-arms,thefulcrum wmay be-inverted, and when it is desired touse mth-euppenholes of the series of .holes in-the 1 the main frame.

lever-armsthe pivot-bolt maypass through 40 It is essential in the rapid and effective operation of the machine for the use to which it is applied in order to produce a picketpointing machine of great range in pointing pickets of all commercial widths that the several adj ustment-s of the principal parts of the machine, as full? described, should be substantially as set forth. It is important that the main frame should be provided with the clearance-space toprevent the clogging of the machine by the chips made in cutting. What I claim as new, and desire to secure by Letters Patent, is-

1. In a picket-pointingmachine,the cutterheadlcomposed otthetwo..groeved. disks, a knife, a chi p-breaker, .and a cutter-head shaft orbolt u pon .whichrth'e chipfbreakerismounted,inicombinationawitlrthecuttingdeven-substantially as described.

2. The main frame .20, provided with-adjustablewhead-block 24- andsthewslotteld; fulcrum-su-pport 22, upon ,WhlChnt-ht); adjustable fulcrum is mounted, in combination miththe cutting-lever 35;.providedwith(the, adjustable breaker 42, substantially as and fomthe purposes SGlkfOI'l-h.

two. subscribing witnesses.

JOHNS XV. MINOR.

lVitnesses:

. J. EDWARD -PORTER, :GHARLES 0..F ARRAR. 

